Canadian stocks swung between gains and losses after a four-day slump as commodities prices advanced, while Goldcorp Inc. (G) plunged after cutting its gold- production forecast.

Goldcorp dropped 9.4 percent, the most in three years. The company cited lower expected output from Mexico and Canada in reducing its estimate. Centerra Gold Inc. and Research In Motion Ltd. gained at least 2.6 percent.

The S&P/TSX added 4.65 points, or less than 0.1 percent, to 11,516.87 at 9:57 a.m. in Toronto. It earlier slid as much as 0.2 percent. The benchmark index lost 3.4 percent over the last four days.

To contact the reporter on this story: Katia Dmitrieva in Toronto at edmitrieva1@bloomberg.net

To contact the editor responsible for this story: Lynn Thomasson at lthomasson@bloomberg.net